/**
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.journalkeeper.utils.async;

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.function.Supplier;

/**
 * @author LiYue
 * Date: 2019/12/13
 */
public class Async {
    public static <T> CompletableFuture<T> scheduleAsync(
            ScheduledExecutorService executor,
            Supplier<CompletableFuture<T>> command,
            long delay,
            TimeUnit unit
    ) {
        CompletableFuture<T> completableFuture = new CompletableFuture<>();
        executor.schedule(
                (() -> {
                    command.get().thenAccept(
                            completableFuture::complete
                    )
                            .exceptionally(
                                    t -> {
                                        completableFuture.completeExceptionally(t);
                                        return null;
                                    }
                            );
                }),
                delay,
                unit
        );
        return completableFuture;
    }

}
